Add endpoint and cron job to aggregate all dimensions and values

appengine/swarming/server/bot_management.py

Index: appengine/swarming/server/bot_management.py
diff --git a/appengine/swarming/server/bot_management.py b/appengine/swarming/server/bot_management.py
index 48c3afb8aa43fddeb5a8f8058975fd98a8b5790e..82c42545c3385a1b1e73db73367d1969d0f783cf 100644
--- a/appengine/swarming/server/bot_management.py
+++ b/appengine/swarming/server/bot_management.py
@@ -211,6 +211,18 @@ class BotSettings(ndb.Model):
   quarantined = ndb.BooleanProperty()
 
 
+class DimensionValues(ndb.Model):
+  dimension = ndb.StringProperty()

[M-A Ruel, 2016/08/05 14:36:05]

key = ndb.StringProperty()

[kjlubick, 2016/08/05 17:38:58]

"Don't name a property "key." This name is reserved for a special property used
to store the Model key. Though it may work locally, a property named "key" will
prevent deployment to App Engine."
https://cloud.google.com/appengine/docs/python/ndb/entity-property-reference

[M-A Ruel, 2016/08/05 18:06:00]

Ugh, I forgot about that.

+  values = ndb.StringProperty(repeated=True)
+
+
+class DimensionAggregation(ndb.Model):
+  """Has all dimensions that are currently in use."""
+  dimensions = ndb.LocalStructuredProperty(DimensionValues, repeated=True)
+
+  ts = ndb.DateTimeProperty(auto_now_add=True)

[M-A Ruel, 2016/08/05 14:36:05]

ts = ndb.DateTimeProperty()


KEY = ndb.Key(DimensionAggregation, 'current')


then refer to DimensionAggregation.KEY.get() everywhere, instead of copy-pasting
'current'.

[kjlubick, 2016/08/05 17:38:58]

Done.

+
+
 ### Private APIs.